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468 results for “Pheidole”
Fig. 1 in Pheidole praehistorica sp. nov., a new addition to spiny ants of the genus Pheidole Westwood, 1839 (Formicidae, Myrmicinae) from Oligo-Miocene Mexican amber
Fig. 1. Pheidole praehistorica sp. nov. A–C. Holotype (CPAL.464). A. Profile view. B. Frontal view. C. Closer lateral view of the head and mesosoma. D. Paratype (CPAL.465), latero-frontal view of the head. E. Paratype (CPAL.468), profile view. Abbreviations: acl = antennal club; an = antenna; cly = clypeus; ey = eyes; fl = foreleg; ga = gaster; ha = hairs on clypeus; hd = head; hl = hind leg; mn = mandible; nck = neck; p = petiole; pn = pronotum; pns = pronotal spine; pp = postpetiole; pps = propodeal spine; sc = scape.
Fig. 3 in Pheidole praehistorica sp. nov., a new addition to spiny ants of the genus Pheidole Westwood, 1839 (Formicidae, Myrmicinae) from Oligo-Miocene Mexican amber
Fig. 3. The phylogenetic status of Pheidole praehistorica sp. nov. among fossil and extant congeners inferred from the list of characters (Supp. file 1: Table S1) and the data matrix (Supp. file 1: Table S2), shows the twenty-eight morphological characters to construct the most parsimonious tree. The numbers above the white and black dots represent morphological characters, and the numbers below represent the character encoding. Black dots represent synapomorphies, and white dots represent homoplasies. † represents fossil species from Dominican and Mexican amber. Consistency index = 0.52; retention index = 0.65.
Fig. 2 in Pheidole praehistorica sp. nov., a new addition to spiny ants of the genus Pheidole Westwood, 1839 (Formicidae, Myrmicinae) from Oligo-Miocene Mexican amber
Fig. 2. Pheidole praehistorica sp. nov., holotype (CPAL.464), schematic drawing. A. Profile view. B. Frontal view.
Figs. 20–23 in First discovery of the mangrove ant Pheidole sexspinosa Mayr, 1870 (Formicidae: Myrmicinae) from the Oriental region, with redescriptions of the worker, queen and male
Figs. 20–23. Genitalia of Pheidole sexspinosa male, non-type (ZRC_ENT00007290, Singapore, Mandai mangroves). 20, Pygostyle in dorsal view; 21, abdominal sternite IX in ventral view; 22, paramere and volsella, right side, inner view; 23, penisvalva, left side, outer view. Abbreviations: Bm = basimere; Cs = cuspis; Dg = digitus; Ga = gonostipital arm; Lp = lateral apodeme of penisvalva; Tm = telomere; Va = valvura; Vo = volsella.
Fig. 1 in First discovery of the mangrove ant Pheidole sexspinosa Mayr, 1870 (Formicidae: Myrmicinae) from the Oriental region, with redescriptions of the worker, queen and male
Fig. 1. Map of current known geographic distribution of Pheidole sexspinosa. The Lydekker Line is shown as a dotted line. Geographic coordinates of localities where P. sexspinosa was recorded were obtained from antmaps.org (http://www.antmaps.org). Localities for barcoded specimens are indicated with solid circles in red (Pheidole sexspinosa: MH726208 – 726210; Singapore; present study), blue (Pheidole sexspinosa: KJ141794.1, EF518404; Palau; Economo et al., 2015) and green (Pheidole sexspinosa biroi: KJ141800.1; Papua New Guinea; Economo et al., 2015), respectively.
Figs. 14–19 in First discovery of the mangrove ant Pheidole sexspinosa Mayr, 1870 (Formicidae: Myrmicinae) from the Oriental region, with redescriptions of the worker, queen and male
Figs. 14–19. Pheidole sexspinosa, non-type male (ZRC_ENT00007290, Singapore, Mandai mangroves). 14, Head in full-face view; 15, mesosoma and waist in dorsal view; 16, body in lateral view; 17, closeup of mesosoma and waist segments in lateral view; 18, hind wing in lateral view; 19, forewing in lateral view.
Figs. 6–10 in First discovery of the mangrove ant Pheidole sexspinosa Mayr, 1870 (Formicidae: Myrmicinae) from the Oriental region, with redescriptions of the worker, queen and male
Figs. 6–10. Pheidole sexspinosa, non-type minor (ZRC_ENT00007290, Singapore, Mandai mangroves). 6, Head in full-face view; 7, mesosoma and waist in dorsal view; 8, body in lateral view; 9, labial palpus in lateral view; 10, maxillary palpus in lateral view.
Figs. 11–13 in First discovery of the mangrove ant Pheidole sexspinosa Mayr, 1870 (Formicidae: Myrmicinae) from the Oriental region, with redescriptions of the worker, queen and male
Figs. 11–13. Pheidole sexspinosa, non-type dealate queen (ZRC_ENT00000768, Singapore, Kranji mangroves). 11, Head in full-face view; 12, mesosoma and waist in dorsal view; 13, body in lateral view.
Figs. 2–5 in First discovery of the mangrove ant Pheidole sexspinosa Mayr, 1870 (Formicidae: Myrmicinae) from the Oriental region, with redescriptions of the worker, queen and male
Figs. 2–5. Pheidole sexspinosa, non-type major (ZRC_ENT00007290, Singapore, Mandai mangroves). 2, Head in full-face view; 3, mesosoma and waist in dorsal view; 4, hypostoma in ventral view; 5, body in lateral view.
Data from: Functional richness shows spatial scale dependency in Pheidole ant assemblages from Neotropical savannas
There is a growing recognition that spatial scale is important for understanding ecological processes shaping community membership, but empirical evidence on this topic is still scarce. Ecological processes such as environmental filtering can decrease functional differences among species and promote functional clustering of species assemblages, whereas interspecific competition can do the opposite. These different ecological processes are expected to take place at different spatial scales, with competition being more likely at finer scales and environmental filtering most likely at coarser scales. We used a comprehensive dataset on species assemblages of a dominant ant genus, Pheidole, in the Cerrado (savanna) biodiversity hotspot to ask how functional richness relate to species richness gradients and whether such relationships vary across spatial scales. Functional richness of Pheidole assemblages decreased with increasing species richness, but such relationship did not vary across different spatial scales. Species were more functionally dissimilar at finer spatial scales, and functional richness increased less than expected with increasing species richness. Our results indicate a tighter packing of the functional volume as richness increases and point out to a primary role for environmental filtering in shaping membership of Pheidole assemblages in Neotropical savannas.
3D Cybertype datasets for: Pheidole klaman sp. N.: A new addition from Ivory Coast to the Afrotropical pulchella species group (Hymenoptera, Formicidae, Myrmicinae)
<p>In this study we update the taxonomy of the <em>Pheidole pulchella</em> species group for the Afrotropical region and we describe the new species <em>P. klaman</em> <strong>sp. nov.</strong> We integrate the new species into the existing taxonomic system by providing an updated identification key for the whole group and updating the known distribution ranges of its members. We provide high quality focus stacking images, along with X–ray micro–CT scanned digital 3D representations, of major and minor worker type specimens. The Cybertype dataset provided in this study consist of the full micro-CT original volumetric datasets (in DICOM format), 3D surface models (in PLY formats), 3D rotation video files (in MP4 format), all stacked digital color images, and all image plates including all important images of 3D models for each species. In addition to the cybertype data at Dryad, we also provide freely accessible 3D surface models of all treated species on Sketchfab (holotype: <a href="https://skfb.ly/o68Qw">https://skfb.ly/o68Qw</a>; paratypes: <a href="https://skfb.ly/o68Qq">https://skfb.ly/o68Qq</a> & <a href="https://skfb.ly/o68Qo">https://skfb.ly/o68Qo</a>).</p>
Figure 11 in Additions to the taxonomy of Pheidole (Hymenoptera: Formicidae) from the southern grasslands of Brazil
Figure 11 Map of South Brazil showing the localities for the new Pheidole species described here.
Data from: Functional richness shows spatial scale dependency in Pheidole ant assemblages from Neotropical savannas
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Data from: Evolution of the latitudinal gradient in the hyperdiverse ant genus Pheidole
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3D Cybertype datasets for: Pheidole klaman sp. N.: A new addition from Ivory Coast to the Afrotropical pulchella species group (Hymenoptera, Formicidae, Myrmicinae)
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Data from: Evidence for a thoracic crop in the workers of some Neotropical Pheidole species (Formicidae: Myrmicinae)
<p>The ability of ant colonies to transport, store, and distribute food resources through trophallaxis is a key advantage of social life. Nonetheless, how the structure of the digestive system has adapted across the ant phylogeny to facilitate these abilities is still not well understood. The crop and proventriculus, structures in the ant foregut (stomodeum), have received most attention for their roles in trophallaxis. However, potential roles of the esophagus have not been as well studied. Here, we report for the first time the presence of an auxiliary thoracic crop in <i>Pheidole aberrans </i>and <i>Pheidole deima</i> using X-ray micro-computed tomography and 3D segmentation. Additionally, we describe morphological modifications involving the endo and exoskeleton that are associated with the presence of the thoracic crop. Our results indicate that the presence of a thoracic crop in major workers suggests their potential role as repletes or live food reservoirs, expanding the possibilities of tasks assumed by these individuals in the colony. Our contribution emphasizes the utility of combining data from external and internal morphology to better understand functional and behavioral mechanisms.</p>
FIGURE 28 in The ant genus Pheidole Westwood, 1839 (Hymenoptera: Formicidae) in Madagascar-taxonomic revision of the bessonii species-group
FIGURE 28. Distribution. Pheidole antsahabe (A). Pheidole atsirakambiaty (B). Pheidole bessonii (C). Pheidole clara (D). Pheidole decollata (E). Pheidole flammea (F). Pheidole flavodepressa (G). Pheidole grallatrix (H). Pheidole madecassa (I). Pheidole mantadioflava (J). Pheidole maro (K). Pheidole oswaldi (L). Pheidole ovalinoda (M). Pheidole similis (N). Pheidole tenebrovulgaris (O). Pheidole uranus (P). Pheidole voreios (Q). Pheidole zirafy (R).
FIGURE 27 in The ant genus Pheidole Westwood, 1839 (Hymenoptera: Formicidae) in Madagascar-taxonomic revision of the bessonii species-group
FIGURE 27. Major worker, hypostomal tooth. Pheidole antsahabe (A). Pheidole atsirakambiaty (B). Pheidole bessonii (C). Pheidole clara (D). Pheidole decollata (E). Pheidole flammea (F). Pheidole flavodepressa (G). Pheidole grallatrix (H). Pheidole madecassa (I). Pheidole mantadioflava (J). Pheidole maro (K). Pheidole oswaldi (L). Pheidole ovalinoda (M). Pheidole similis (N). Pheidole tenebrovulgaris (O). Pheidole uranus (P). Pheidole voreios (Q). Pheidole zirafy (R).
FIGURE 26 in The ant genus Pheidole Westwood, 1839 (Hymenoptera: Formicidae) in Madagascar-taxonomic revision of the bessonii species-group
FIGURE 26. Pheidole zirafy, full-face view (A), profile (C), and dorsal view (E) of paratype minor worker (CASENT0807268) and full-face view (B), profile (D), and dorsal view (F) of holotype major worker (CASENT0923249).
FIGURE 23 in The ant genus Pheidole Westwood, 1839 (Hymenoptera: Formicidae) in Madagascar-taxonomic revision of the bessonii species-group
FIGURE 23. Pheidole tenebrovulgaris, full-face view (A), profile (C), and dorsal view (E) of paratype minor worker (CASENT0235036) and full-face view (B), profile (D), and dorsal view (F) of holotype major worker (CASENT0128508).
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